1761-6.5
5-12
DNI Configuration Parameters and Programming Notes
Output Word Offset
This parameter identifies the starting word within the output file identified
by the Output Data File parameter. The value entered is the first word of
data that is written to the controller attached to the DNI. Based on the DF1
Device selected, the sizes of compatible data files within Allen-Bradley
controllers are:
Parameter
Type
Parameter Number Description Range Default Value
Series A Series B
I/O 11 10 Output Word Offset 0 to 254 1
Controller Output Data File s File Sizes
MicroLogix 1000
Bit 32 Words
Integer 105 Wor ds
SLC/Other MicroLogix
Bit 255 Words
Integer 255 Wor ds
PLC
Bit 999 Words
Integer 999 Words
Note:
The DNI can only access data from words 0 through 254.
Important:
You must have sufficient room in the file that you select. Make
sure the Output Word Offset plus the Output Size does not
exceed the boundary of the data file. For example, a
MicroLogix 1000 controller has 32 words in its bit file;
therefore, you could not use a Output Word Offset of 30 and a
Output Size of 5 because this exceeds the file size.
Important:
If RSNetworx or DeviceNet Manager is used to configure/
commission the DNI, it is up to the user to select the correct
values for:
•
Output Size
•
Output Split Point (DNI Series B only)
•
Output Type
•
Output Data File
•
Output Word Offset
Only the DNI Configuration Software Utility performs checks
on the information entered.
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